On Friday, September 28th NIGHTWISH took the stage at the Ogden Theatre in Denver, CO without vocalist Anette Olzon, who was hospitalized due to illness. Support act KAMELOT‘s backing vocalists Elize Ryd (AMARANTHE) and Alissa White-Gluz (THE AGONIST) stepped in to fill Olzon’s role alongside bassist/male singer Marco Hietala. Fan-filmed video is available below: